#infovis {
    position:relative;
    width:600px;
    height:600px;
    margin:auto;
    overflow:hidden;
}

.tip {
    color: #111;
    width: 139px;
    background-color: white;
    border:1px solid #ccc;
    -moz-box-shadow:#555 2px 2px 8px;
    -webkit-box-shadow:#555 2px 2px 8px;
    -o-box-shadow:#555 2px 2px 8px;
    box-shadow:#555 2px 2px 8px;
    opacity:0.9;
    filter:alpha(opacity=80);
    font-size:13px;
    font-family:Verdana, Geneva, Arial, Helvetica, sans-serif;
    padding:7px;
}